TB 9-4935-214-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Voltage Divider, Electro Scientific Industries Model RV722; and General
Resistance, Model DV4107C. The manufacturers' manuals were used as the prime data
sources in compiling these instructions. The equipment being calibrated will be referred to
as the TI (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are described in text.
b. Time and Technique. The time required for this calibration is approximately 4
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications, which
pertain to this calibration, are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Input resistance
Range: 100 kΩ
Accuracy: 0.005%
Linearity
Accuracy: 1 ppm
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Standards
Calibration Set NSN 4931-00-621-7878, and is to be used in performing this procedure.
Alternate items may be used by the calibrating activity. The items selected must be
verified to perform satisfactorily prior to use and must bear evidence of current calibration.
The equipment must meet or exceed minimum use specifications listed in table 2. The
accuracies listed in table 2 provide a four-to-one ratio between the standard and TI. Where
the four-to-one ratio cannot be met, the actual accuracy of equipment selected is shown in
parenthesis.
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure. The following peculiar accessories are also required for this
calibration: Lead compensator, Electro Scientific, Model 875B (7910539-2).
